va-va-voom
Concise Oxford English Dictionary © 2008 Oxford University Press:
va-va-voom /ˌvavaˈvuːm/ informal
▶noun the quality of being exciting, vigorous, or sexually attractive. ▶adjective sexually attractive: her va-va-voom figure.
– origin 1950s (orig. US): representing the sound of a car engine being revved.
'va-va-voom' also found in these Oxford entries:

